IB Biology SL 3.2.6 Coronary Heart Disease Question Bank
Practise IB Biology SL 3.2.6 by linking thrombosis, cholesterol and plaque formation to reduced coronary blood flow and heart disease.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Explain how thrombosis or plaque narrows coronary arteries and reduces oxygen delivery.
- Link high cholesterol to plaque formation, restricted flow and coronary heart disease.
B3.2.6—Coronary artery occlusion question 1
[Maximum number: 2]
Outline the causes and consequences of blood clot formation in coronary arteries.
a. coronary heart disease/CHD/coronary artery disease/CAD occurs when there is reduction of oxygen to the heart muscle
b. high ratio of LDL to HDL/fatty diet leads to plaque formation in arteries
c. plaque breaks off causing damage that activates blood clot formation
d. clots «in the bloodstream» may block a coronary artery/coronary thrombosis reducing blood flow/oxygen OR clots can cause heart attack/muscle death
e. sickle cell anemia «crisis» produces blood clots «that can cause coronary/arterial blockage»
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